Door latch



April 4, 1950 T 2,502,666

DOOR LATCH I Filed Aug. 24, 1946 2 Sheets-Sheet 1 //VVENTOR 6 ROLANDEOTT A T TORNE r R. E. OTT

DOOR LATCH April 4, 1950 Filed Aug. 24, 1946 2 Sheets-Sheet 2 lNVEA/TOR ROLAND E. OTT

ATTORNEY i atented Apr. 4, 1956 UNITED STATES PATENT. OFFICE DOOR LATCH- Roland E. Ott, Portland, Oreg.

Application August 24, 1946, Serial No. 692,807

1 Claim. 1

This invention relates generally to door locks and particularly to a form of lock in which the opening movement is caused by pressure instead of rotation.

The main object of this invention is to construct a door lock of the type illustrated in my prior United States Patent Number 2,190,080 of which the device described herein is an improvement.

The second object is to'construct a lock of the class described which will lend itself to manufacture by die casting methods.

The third object is to so construct the lock that it will be easy to assemble and install.

The fourth object is to requirethe use of only one spring.

The fifth object is to construct a lock of the class described having an improved toggle ac tion requiring less movement by the actuator and providing a better holding action for the latch element. I

The sixth object is to so construct the lock that it will decrease the tendency of the part of the door to rattle when in a closed position.

The seventh object is to employ a toggle type of spring thereby urging the latch in either of the extreme positions.

The eighth object is to provide an. improved form ofstriker plate for the purpose of improving th operation of the lock.

The ninth object is to provide a form of actuator or handle in which a spring-is incorporated in each side of the handle member.

The tenth object is to construct a form of actuating handle for my lock which will eliminate confusion by preventing attempts to actuate the door lock by rotation.

These and other objects will become more apparent from the specification following as illustrated in the accompanying drawings, in which:

Fig. 1 is an elevation of the lock.

Fig. 2 is a side elevation of the lock.

Fig. 3 is a section taken along the line 3-3 in Fig. 11.

Fig. 4 is a rear view of the outer front plate.

Fig. 5 is a front elevation of the assembled lock showing the door cut away in section to disclose same.

Fig. 6 is a transverse section taken along the line 6-6 in Fig. 11.

Fig. 7 is a transverse section taken along the line 1-1 in Fig. 11.

Fig. 8 is a view of the lock with the cover removed and showing the latch withdrawn.

Fig. 9 is a section along the line 9-9 in Fig. 4,

Fig. 10 is a section through the striker plate.

Fig. 11 is a view similar to Fig. 8 but showing the latch extended to a locking position.

Fig. 12 is a longitudinal section through the lock showing the latch completely withdrawn.

Fig. 13 is an end view of Fig. 12.

Fig. 14 is a view similar to Fig. 12 but showing the latch extended.

Fig. 15 is an end view of Fig. 14, with the cover removed. 5

Fig. 16 is a fragmentary section through a door showing the lock in transverse cross section and showing the position of the operating handles.

Fig. 17 is a side elevation of one of the handles and the plate through which it operates.

Similar numerals refer to similar parts throughout the several views.

Referring in detail to the drawings, there is shown an outer plate 2%] provided with a rectangular opening 2|- and a pair of countersunk holes 22 through which pass the screws 23 by means of which the lock is secured to the door 24. Behind theouter plate 2|] is secured the back plate 25 which .is in reality a flange ex tending from the circular body 26. Thebody 25 has its uppermost portion cut away and is provided with a cap 21 which completes the cylindrical form of the body. There is formed in the body 26 a rectangular channel on whose bottom 28 rides the mechanism of the latch.

The latch mechanism consists of a pair of side plates 29 between whose ends 30 is disposed a pin 3! upon which is rockably mounted the lever 32 which is joined by the pin 33 to the latch actuating arms 34 whose opposite end carries a transverse pin 35 to which is attached latch 36 which is hingedly mounted on pin 3'! which also extends through the plates 29. It will be noted in Fig. 14 that the latching face 38 is inclined somewhat with relation to the face 39 of the side plates 29. The purpose of this inclination is to facilitate the entrance of the latch 35 into the opening of the striker plate 40 which is secured to the casing M by means of screws 42.

The striker plate 40 has a latch opening 43 formed therein whose edge 44 is preferably rounded as shown to facilitate the action of the latch 38 therein.

There is also shown a spring 45 one end of which is attached to the arms 34 by means of pin 46, while the opposite end of the spring 45 is connected by the rivet 4! to the body 26.

There is also provided a stop pin 48 against which the top side 49 of the arms 34 rests, when the parts are in the position shown in Fig. 12.

Extending through the bottom 28 is the large hole 50 while the smaller hole extends through the cap 21. These holes are in axial alignment.

The cap 21 has a circular end 52 which forms a closure for the channel 53 formed above the bottom 28. The end 52 is held in place by means of screw 54 while the end 55 extends under the flange 56 formed on the outer plate 20.

The bottom 28 is provided with a recess 51 which affords clearance for the corner 58 of the latch 36 and also provides clearance for the spring 45.

It is desirable to bevel the edge 59 of the outer plate as illustrated in order to provide clearance for the corner 58 of the latch 36 and also to avoid the necessity of too great a clearance on this side of the latch 35.

In Figs. 16 and 17 are shown the door 24 having the lock body 26 mounted therein and having the transverse hole '60 formed therethrough in alignment of the holes 50 and 5|.

Extending axially through the holes 50 and 5! and between the members 34 is a threaded spindle whose head 62 and nut 63 are clamped against the inturned end '64 integral with the round handle member 65 which projects through a slot in the escutcheon plate 66 which is fastened to the door 24 by means of the screws 61.

The handle 65 is held at its lower end 68 to the door 24 by means of screw 69. The material in the handle 65 is of a spring metal adapted to urge the spindle GI outwardly.

On the opposite or rear side of the door is mounted the escutcheon plate through which slidably extends the handle H whose inturned end 12 is in register with but does not touch the nuts 13 and 14 which are locked upon the spindle. The handle TI is of a spring material and has its lower end secured to the door .24 by means of screw 16. The operation of the lock is as follows: Assuming that the parts are in the latched position (Fig. 14) showing the latch in an extended position in which a door is latched shut and it is desired to open the door, a slight push on the handle H or a pull on the handle 65 will move the parts to the position shown in Fig. 12 in which the latch 36 is withdrawn by rocking it to a releasing position in which the opening movement of the door assists in the actuation of the latch.

This form of the lock has a great advantage over the lock described in my earlier patent in that it requires only a fraction of the operating 4 movement and also that the parts need not be accurately made.

It can be seen from the foregoing that when this special form of handle is used with my look, there is no tendency toward confusion by attempts to open the door by rotative action, and the natural action is that of pushing or pulling. Since the handles themselves serve as springs, it has been possible to eliminate from the lock other springs which would be required to function in a like manner.

It can be seen from the foregoing that while there is general similarity between the present invention and the one described in my prior patent, the operation has been greatly improved and the manufacture thereof simplified.

One of the outstanding improvements in the present invention resides in the action of toggle spring in which the members are urged toward the most desirable position.

It is desirable to provide the flattened faces 11 and "18 on the members 21 and 26 in order to provide more movement for the handle members.

I claim:

A door lock of the class described consisting of a cylindrical barrel having a door plate mounted on the outer end thereof, said barrel having a rectangular opening therein constituting a longitudinal guide, a pair of spaced side plates slidably mounted in said guide, said door plate having an opening equal in width to the spacing of said plates, a rock lever pivoted at one end between one pair of side plate ends, a latch rockably mounted on the outer ends of said side plates, a pair of arms connecting said latch and rock lever, a spring for urging said side plates outwardly and a stop pin between said side plates limiting the movement of said arms in a latch releasing direction, and spring urged handles for actuating said rock lever.

ROLAND E. OTT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,525,135 Jones Feb. 3, 1925 2,121,531 Murphy June '21, 1938 2,190,080 Ott Feb. 13, 1-940 

